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A comparison of upper vs. lower and right vs. left visual fields using lexical decision.

A Goldstein1, H Babkoff

  • 1Department of Psychology, Bar-Ilan University, Ramat-Gan, Israel. goldsa@mail.biu.ac.il

The Quarterly Journal of Experimental Psychology. A, Human Experimental Psychology
|January 5, 2002
PubMed
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The upper visual field (UVF) shows faster and more accurate word recognition than the lower visual field (LoVF). This UVF advantage persists regardless of visual hemifield or eccentricity, suggesting top-down processing.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • The human visual system exhibits functional asymmetries between the upper and lower visual fields.
  • Understanding these differences is crucial for comprehending visual processing and word recognition mechanisms.

Purpose of the Study:

  • To investigate functional differences in word recognition between the upper visual field (UVF) and lower visual field (LoVF).
  • To explore the influence of visual hemifield and semantic priming on these visual field asymmetries.

Main Methods:

  • Utilized the lexical decision task to assess word-nonword discrimination.
  • Presented word stimuli in various visual fields (UVF, LoVF, RVF, LVF) and manipulated eccentricity.
  • Employed related word primes and semantically constraining sentence primes.

Related Experiment Videos

Main Results:

  • Word recognition was significantly faster and more accurate in the UVF compared to the LoVF.
  • The UVF advantage was consistent across different eccentricities and visual hemifields (RVF/LVF).
  • Semantic priming generally enhanced visual field differences, with sentence primes specifically boosting the right visual hemifield (RVF) advantage.

Conclusions:

  • The superiority of the UVF in word recognition is not solely attributable to perceptual or attentional factors.
  • Evidence suggests that top-down information flow plays a significant role in UVF advantages.
  • These findings contribute to understanding the neural basis of visual field asymmetries in language processing.